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Test your basic knowledge |
Dairy Cattle And Reproduction
Start Test
Study First
Subjects
:
industries
,
dairy
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 26 hours after estrus begins
cow estrus cycle
urethra
ewe ovulation
sertoli cells
2. 30 hours after estrus begins
Hard
sertoli cells
penis sizes vs delivering methods
cow ovulation
3. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood
cervix
oviducts
Follical Stimulating in females
penis proper
4. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market
pelvis
ewe gestation
reasons for castration
functions of progestrone
5. Why does estrus happen before ovulation?
functions of progestrone
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
stag
penis and prepuce observation (BSE)
6. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)
4 major reasons for culling dairy cows
femininity of a heifer
polyestrous
accessory sex glands
7. 30 hours after estrus begins
penis proper
van deferens
cow ovulation
urethra
8. What makes the milk flow through the mammary glands?
mastitis
Blood
penis proper
cow ovulation
9. Sperm production
Blood
penis proper
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
spermatogenesis
10. Important 'landmark' during palpation
Lutinizing Hormone in males
cervix
Hormones from both the fetus and the mom.
growth lost from castration methods (knife & band)
11. The more stressed out the male is - the less sperm he is going to produce
sertoli cells
castration
humans: stress level vs sperm
pelvis
12. Check feet and legs - look for masculine traits in build such as crest and muscling
cow gestation
visual evaluation (BSE)
normal presentation of the fetus
dry-off time in dairy cattle
13. Superior genes are _______ to multiply
sow estrus
dry matter and water
Hard
estrous
14. 1. brain function - 2. blood flow - 3. willing female
seasonally polyestrous
Dairy calves are removed from cow at birth to...
what has to happen for males for copulation to occur
Dairy Cattle Lactation (standard)
15. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.
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16. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days
penis and prepuce observation (BSE)
4 major reasons for culling dairy cows
epididymis: definition - 3 parts - 4 functions
Follical Stimulating in females
17. Scar tissue plugs up chambers of udder
testosterone
cow estrus cycle
mastitis
~1 month
18. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract
Dairy Cattle Lactation (standard)
eminal vesicles
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
age and castration
19. 1. brain function - 2. blood flow - 3. willing female
hormones
what has to happen for males for copulation to occur
cow estrus cycle
Reasons for gestation length being affected
20. Look for infection - split - and rupture of the penis
polyestrous
mare gestation
elastrator
penis and prepuce observation (BSE)
21. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm
6-8 weeks
1. more cost effective - 2. powdered milk is in excess production
Follical Stimulating in males
uterus
22. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.
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23. Days which have increasing daylight hours
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24. Can survive ~7 days in cow. vast majority <48 hours
mare's estrous cycle
sow estrus
Sperm survival specs
ewe gestation
25. To remove/separate testicles from animal's body before animal reaches puberty
sperm cell
organs used in spermatogenesis
castration
prostate gland
26. Contains and regulates the temp of the testes for sperm production
scrotum
rectal palpation (BSE)
van deferens
1. more cost effective - 2. powdered milk is in excess production
27. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells
organs used in spermatogenesis
Dairy calves are removed from cow at birth to...
accessory sex glands
Lutinizing Hormone in males
28. 114 days
mare gestation
purpose of Breeding Soundness Exam (BSE) for males
sow gestation
functions of progestrone
29. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co
cowper's gland
Jersey Cow
effects of BST
sigmoid flexure
30. Days which have decreasing daylight hours
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31. FEED
cryptorchid
leydid or interstitial cells
#1 cost in production
Follical Stimulating in females
32. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.
cremaster muscle
Brown Swiss Cow
epididymis: definition - 3 parts - 4 functions
Reasons for gestation length being affected
33. Animals which have only one estrous cycle (ex: dog - fox)
4 major reasons for culling dairy cows
ewe's estrous cycle
monestrous
leydid or interstitial cells
34. 30-38 hours after estrus cycle begins
feeding a high producing dairy cow
van deferens
mare estrus cycle
sow ovulation
35. (male) pushes the testes upward toward the body for warmth or protection
Blood
cremaster muscle
things to check for in a breeding soundness exam (BSE)
dartos muscle
36. 147 days
ewe gestation
organs used in spermatogenesis
Dairy Cattle Gestation
mare's estrous cycle
37. 16-20 hours
cow estrus
mare's estrous cycle
sow ovulation
Avg. bull specs
38. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)
sow ovulation
6-8 weeks
estrous
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
39. (FSH) causes egg to mature in females
Follical Stimulating in females
dartos muscle
vulva
dry matter and water
40. 45-60 days after breeding; re-breed as required
Culls bulls earlier (2 reasons)
growth lost from castration methods (knife & band)
dairy cattle pregnancy check
cryptorchid
41. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)
monestrous
sow ovulation
ewe estrus cycle
accessory sex glands
42. FEED
Parturition
colostrum
Dairy Cattle milking schedule
#1 cost in production
43. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.
pelvis
ewe's estrous cycle
rectal palpation (BSE)
colostrum
44. Luteolysis happens because of the ____________ hormone
mare ovulation
prostaglandin
prostate gland
scrotum
45. Produce testosterone. located between the seminiferous tubules
why does the cow need fat deposits during pregnancy?
hypothalamus and pituitary gland
Grading choice
leydid or interstitial cells
46. Depository for semen during insemination. where urine leaves the body
sow estrus
cowper's gland
vagina
Grading choice
47. (male) pushes the testes outward toward the legs for a cool-down off of the body
mare's estrous cycle
cremaster muscle
stag
vagina
48. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat
ewe ovulation
semen evaluation (BSE)
Holstein Cow
pelvis
49. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)
#1 cost in production
feeding a high producing dairy cow
reasons for castration
Size of cow in relation to the amount of milk produced
50. 147 days
ewe gestation
colostrum
mare ovulation
Brown Swiss Cow